Goblin Slayer Side Story: Year One, Vol. 10 (manga)

"Goblin Slayer and his examiner are backed into a corner when the rank exam goes wrong but even a goblin lord is no match for the fearsome strategies Goblin Slayer can devise with a supply of explosive fire powder! Elsewhere, deep in the bowels of the earth, Young Warrior's party engages in fierce combat with the undead at the gates of an underground city they will soon learn the walls were built not to keep them out but to keep something in. . . --Provided by publisher.